Alexandra Fine and Janet Lieberman, two twenty-somethings living in Brooklyn, are out to change the way women experience sex.

With backgrounds in sex therapy and mechanical engineering, the duo paired up to create "Dame Products," a sex-toy company that is building the first ever hands-free non-intrusive wearable vibrator to add clitoral stimulation during intercourse.

"When you look at sexuality, there is a huge disparity between men and women's pleasure," Fine, who studied Clinical Psychology and sex therapy at Columbia University, told BuzzFeed News. "Women are much more likely to find sex non-enjoyable and much less likely to have orgasms." (According to the Center for Sexual Health, only 64% of women reported having had an orgasm at their last sexual encounter.)

Fine and Liberman call this the "pleasure gap," and are hoping their product will help narrow it.

In part, the pleasure gap is caused by a lack of clitoral stimulation during intercourse.

According to the Kinsey Institute, up to 70 percent of women need clitoral stimulation to orgasm. But Dame Products suggests that providing such stimulation during sex "is often awkward, tiring, or disruptive to one or both partners."

That's exactly where their vibrator, The Eva, comes in.

The Eva is a small hands-free vibrator that a woman can tuck under her labia majora during sex.

To use it, you insert it in between your labia lips and leave it on during sex for direct clitoral stimulation.

"I wanted to empower women to enjoy sex while creating a product that wasn't obtrusive, so her partner can still totally focus on her," said Fine, adding that she didn't want to the Eva to look like a penis because some men do feel threatened by sex toys in the bedroom.

The product was built by Fine's business partner, Lieberman, who is an award-winning mechanical engineer who studied at MIT.

If you still don't get it, here's a nifty cartoon illustrating the placement of the vibrator:

The women of Dame Products describe the Eva as a "one size fits most," admitting that there's no guarantee the Eva will stay in place or be right for all bodies.

"You need a labia to tuck it under," described Fine. "You have to make your own judgment call based on knowing what your body is like. But the women who have tried it have described it as comfortable and secure."

The Eva also isn't right for every sex position. In the YouTube testimonial video below, one user described that the Eva didn't stay in place properly in certain positions, but that she was able to keep it secure using one finger.

So far, 30 women have tested the product, and most have given positive feedback, says Fine.

"Orgasms and sex are some of the most beautiful experiences we have as humans," said Fine. "It makes you happy, it decreases stress, it decreases heart attacks. It's amazing. Women should be able to experience that enjoyably."